I have a '91 XJ but I can't find the brake booster line to seafoam into. Which one is it? What do I seafoam into besides the oil and fuel? Here are some pics.

I just checked and I do not have a brake booster, so what should I seafoam into?

 

Someone should be along shortly to tell ya to use she search function. That's not my style.


Plan and simple. Pour it SLOWLY into the throttle body wile the engine is running. Enjoy the smoke show.

 

If you Seafoam into the brake booster line, expect to replace the O2 sensor afterwards. There have been two guys on this forum that have ruined theirs. It is really simple. Just pour it into about a 1/4 tank of gas and then just drive. No drama needed. It will clean the carbon out that way and not do any harm. Trying to do it too quickly and get white smoke works, but can be more expensive for you.

 

I added mine straight into the TB and gas tank. That is what I did.

 

Ive never fouled my O2 sensor by doing Seafoam in the intake. I guess it is possible, but its not guaranteed. More hit or miss...

 

ive never hurt anything with it... just follow the directions...

 

If you have bad or weak O2 sensors, seafoam will cause the to fail.
You can put the seafoam down the intake tube. Or run it in a nearly empty fuel tank, 1/4-1/8 full.